Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebc6c314b6b29c9…

MALICIOUS

PDF

34.4 KB Authoring application: LibreOffice
MD5: 284bd938d29e1422a0d867f7bbc320a6 SHA-1: 983cb85647164f3e698522d1d730b09c2166af0f SHA-256: 5ebc6c314b6b29c95a9c446af13a0c5488a5a698a7c77418c851a849bbb16da7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, indicative of a link farm designed to distribute malware. ClamAV detected this as Pdf.Phishing.TtraffRobotInstall, and a machine learning classifier also flagged it as malicious. The embedded URLs likely serve as lures to download further malicious content, potentially leading to phishing or further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://muz.ed-pro.ru/uploads/2020/01/28/buwekin.pdf
    • http://mscbmx.com/uploads/1/3/0/5/130550664/2523397.pdf
    • http://tatismoving.ca/uploads/1/3/0/3/130379246/46df58e17e08.pdf
    • http://arti.biz/uploads/2020/01/29/ramumolorulu-wavotebevebisa.pdf
    • http://oakbank-cfbt.org/uploads/1/3/0/4/130436209/winemekuxek.pdf
    • http://basauribai.com/uploads/1/3/0/3/130379959/5503405.pdf
    • http://vebi.avonbox.ru/uploads/2020/01/29/kimekejebebam.pdf
    • http://doverashop.com/uploads/1/3/0/2/130291438/6011062.pdf
    • http://castlepinesvillagegardenclub.org/uploads/1/3/0/5/130543476/5313021.pdf
    • http://mindfulnessinfo.weebly.com/uploads/1/3/0/5/130550903/7263239.pdf
    • http://zod.muaxehoigiatot.com/uploads/2020/01/28/pisunidifejutuki.pdf
    • http://hashtagbottles.com/uploads/1/3/0/4/130476744/kejini_kinaxanefatexik_sutolavudifi.pdf
    • http://blacksmithpdf.com/uploads/1/3/0/7/130739348/130739348.html#the+cosmic+distance+ladder+student+guide+answers

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012f2.bin
1b0e683425c2ba3c61f130c0dbfa80c574b8daf5ed73bbdbda14d7667621df49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2 8016 bytes

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